Safety razor



manica Mul-1, 1932 1,859,106v f I msm :ru-nos. or maw Yonx, 1a. Y., assIeNoa, 3y :resina sssreumms, 'ro ummm;

SAFETY RAZOR Wm Y .application med october o, 1m. seria; no. siones.

Thepresent invention relates to improve-A ments in safety razors-and more particularly to the blade holder an blades thereof.

jIt is a common practice at present in-'the l safety razor trade to manufacture. andl s ell 'blades which fit the blade holders of other manufacturers. The user ma therefore, urchase several. makes of bla es fitting his lade `holder to the exclusion of the blades I manufactured by the maker ofthe holder. While under 4certain circumstances there is nothing wrong with this practice, an extend- E struction which effectively precludes general practice. f.

Another object of the invention is to pro vide a simple and eiiicient blade holder and blade construction which is ca able of manuf facture on a commercial sca e, or in other words one which is not so diilicult to make as to be beyond the reasonable cost of such a contrivance.

With these and other objects in view, which vention is better understood, the same consists in the combination, arran ement and construction of partshereinafter escribed,pointedout inthe appendedclaims and illustrated in the accompanying drawings, it bein understood I -thatmany changes' may bem e in the size and proportion of the several parts'and de-` tails of construction .within the sco of the the spirit or s cing any of t of the invention.

A.' few of the manpossible em ents of the invention'are ustrated in the accom alying drawings, in which f posltioned. upon its support by lugls will more fully appear as the nature of the in' 'face 18 lts longitudinal eds appended claims without departng from 'e acni ea vanta es g Vthreaded -boreand spindle are well-known,

Figure 1 is a front elevation .of a safety COMPANY, I' BOSTON, MASSACHUSETTS, .A CQBPORATIQN `Oil' DELA- samrnazon razor constructed accordance with the resent invention; Fi 2 is a section taken on ine 2-2 of Fig. 1; of the blade supportin element of the razor;

Fig. 4 is a bottom p an view of the 'bladev 1g. 3 is atop plan viewv f clamping element thereof; Fig. 5 is a plan view of the improved blade, showing in dotted lines the blade ositioning lugs of the holder l in operative re ation to the elements ofthe 55' blade cooperating therewith; and Fig. 6 is a similar view of a modified blade.

Referring now first `to Figs. 1 -to 5, inclusive, of the drawings, which illustrate the application of the invention to a safety razor o theGillette t the numeral 10 indicates a blade supportlng plate, :suitably curved along its longitudinal edges. and provided with teeth 11, formin .guards for the wellknown purpose. On n rest a transversely flexible blade 12, aving longitudinal cutting edges 13. This blade is clamping cap 15, which lugs exten through 's plate is ada ted to registering` openings 16 and 17 in the blade i and sup orting plate respectivel the vsaid lugs and) the said openings. bein yof a con,-

.gration to be more fully de'scri d herein- The cap is provided with a concavedunder- Y i,

upper face of the blade. rom the underface of the ca threaded spin e, not shown, whichextends through registering apertures `19 `and 20 in the.

bla-de and supporting plate respectively. The razor is provided with a handle 21, havthreads of which mesh those of the spindle above referred to. Inasmuchas the construction and operation of the vsaid screwresting on the...

projects centrally a screw- .ing a .screw-threaded bore, not shown, the

hereinafter. The head 22 of each position-l ing lug is polygonal in transverse cross-section. In the embodiment of the invention illustrated in Figs. 1 to 3, inclusive, of the drawings, the bounding ligure of the t ansverse cross-section of said head is a regular polygon, more particularly a square, althoughit may be any other polygon, as will appearv more fully hereinafter. The said bounding figure is of a size that the(circle, forming the bounding ligure of the transverse crosssection of the body portion of a lug, may be inscribed into the same. The length of the body portion of each lug exceeds considerably the thickness of the blade 12, so that' thev said body portionv extends into the, opening 17 in the supporting plate 10 in the assembled positions of the elementsof the razor before the blade is iexed in the well-known manner. The purpose of this arrangement will also appear hereinafter.

The registering openings 17 and 16 in the supporting plate 10 and razor blade 12, respectively, are alike in configuration. Their configuration is congruous with the transverse cross-section of the headV of a lug cooperating therewith. As appears more specifically froml Fig. 5 of the drawings these openings are square. Of course, the openings 17 in the supportingplate 10 may be of any other shape, for instance circular and of a size to accommodate the head of a lug.

Asappears from Fig. 5 ofthe drawings, the openings 16 in the blade 12 are so arranged that the edges thereof, that is to say the sides of the polygons, are out of parallelism withthe cutting edges of the blade.

` Consequently, the `edgesof the head 22 are out of parallelism with the longitudinal axis of the clamping cap 15.

In use, theV razor -i's assembled in the'usual manner, Figs. 1 and 2 illustrating the parts assembled in the positions which they occupy -for shaving. It will be noted that when the parts. are in the positions before flexing of the blade for shaving, the edges ,of the polygonal openings 16 in the razor blade already abut against the cylindrical body portions of the supporting lugs, so that, when'the blade is flexed by screwing home the handle 21, the

am.) blade is effectively prevented from shifting both longitudinally and transversely on the supportingplate of the razor, or in any other direction save in the .direction of-the axes of the positioning lugs.

By reason of the construction of the heads 0f the positioningv lugs and the configuration of the openings 16 in the blade, and the spe' cie location of the edges-bf the said openings in relation to the cutting edges of the blade, it is obvious that, if it is attempted to design a blade to iit the razor herein described, such .blade would either have to have circular openings circumscrib'ing the polygonal openings in the blade or be -polygonal and circumscribing the polygonal openings in the' razor blade. In either case, however, the blade would shift transversely on the supporting plate when the handle of the razor is screwed home to secure the blade in shaving position,.because the circumscribing circle or polygon would not contact at a plurality of points with a positioning lug.

AIf the body portion of each supporting lug were not of a length so that the outer end of said body portion were disposed within an opening 17 in the supporting plate when the elements of the razor are assembled before iexing of the blade for use, obviously any blade having either circular or polygonal openings circumscribing the blade openings herein described would t the razor and would be prevented from shifting on the supl porting plate.

Itis obvious that, while herein square supv porting-'lug heads and square lug receiving more than one of the bounding lines of the ol onal opening shall be in parallelism svitligthe cuttin edges of the blade.

In the modication v illustrated in Fig. 6, the positioning-lug receiving openings 25 are rholnbiform, that is to say they are in the shape of equilateral arallelograms. These openings are in the orm of irregular polygons, but are adapted to be inscribed by a circle,as clearly appears from Fig. 6 of the drawings. The co-operation of the blade described in Fig. 6 of the drawings with the heads of the positioning lugs is obvious from the foregoing.

What claim is: l -V 1. The combination with a blade having one or more openings, of alblade holder, a corresponding number of positioning lugs on said holder for coo eration with said openings, each -lug incluv ing a bodA portion xed at one of its endsto said ho der and being -provided at its other end with an enlarge ead having a polygonal transverse. crossgrP section 'into which the boundingbfxre of the transverse cross-section of said y portion is inscribed, the configuration of each o ning in said blade corresponding to that o the transverse cross-section of the head of a lug co-operating therewith.

2. In a combination according to claim 1, said bod)7 portion being of luniform diameter' throughout its length and its length exceed- 10 inthe thickness of said blade.

i ned at New York, in the county of New ork, and State of New York, this 5th day of October, A, D. 1928.`

JOSEPH MUROS. 

